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High-resolution Fourier-transform spectroscopy and deperturbation analysis of the A1Π(v = 1) level in 12C18O
Journal of Quantitative Spectroscopy and Radiative Transfer ( IF 2.3 ) Pub Date : 2020-08-04 , DOI: 10.1016/j.jqsrt.2020.107243
M.I. Malicka , S. Ryzner , A.N. Heays , N. de Oliveira , R.W. Field , W. Ubachs , R. Hakalla

The A1Π(v = 1) level of the 12C18O isotopologue was precisely reinvestigated with two complementary spectroscopic techniques. High resolution B1Σ+ → A1Π(0, 1), (1, 1) and C1Σ+ → A1Π(0, 1) emission bands were recorded in the visible region, 20,700 – 26,100 cm−1, with a 1.71 m Fourier-transform spectrometer (Bruker IFS 125-HR) installed at the University of Rzeszów. The resulting line centre accuracy of isolated and medium to strong lines is 0.005 cm−1. In addition, high-resolution spectra of the A1Π ⟵ X1Σ+(1, 0), B1Σ+⟵ X1Σ+(0, 0) and (1, 0) as well as C1Σ+⟵ X1Σ+(0, 0) bands were recorded between 66,200 and 95,250 cm−1 using the vacuum-ultraviolet Fourier-transform spectrometer installed at the DESIRS beamline of the SOLEIL synchrotron. The wavenumber accuracy for isolated and strong spectral lines is 0.01 cm−1. A data set of 626 spectral lines belonging to seven bands was incorporated into a global deperturbation analysis. Significantly improved deperturbed molecular constants for the A1Π(v = 1), a´3Σ+(v = 10), D1Δ(v = 1), and I1Σ(v = 2) levels, term values of the B1Σ+(v = 0, 1) and C1Σ+(v = 0) Rydberg states as well as the accompanying spin-orbit and rotation-electronic (L-uncoupling) interaction parameters were obtained. The experimental ro-vibrational term values of the A1Π(v = 1) level and its perturbers were also determined. The mixed composition of interacting states is expressed in terms of their 1Π percentage character.



中文翻译:

高分辨率傅里叶变换将A的光谱和deperturbation分析1 Π(v 在= 1)级12 Ç 18 Ò

该A 1 Π(v 所述的= 1)级12 Ç 18 ö同位素被精确地与两个互补光谱技术重新调查。高分辨率乙1 Σ +  →A 1 Π(0,1),(1,1)和C 1 Σ +  →A 1 Π(0,1)的发射带被记录在可见区域,20700 - 26100厘米-1,并在热舒夫大学安装了1.71 m傅立叶变换光谱仪(布鲁克IFS 125-HR)。隔离线和中线到强线的所得线心精度为0.005 cm -1。另外,A的高分辨率光谱1 Π⟵X1 Σ +(1,0),B 1 Σ + ⟵X 1 Σ +(0,0)和(1,0),以及为C 1 Σ + ⟵X 1 Σ +(0,0)频带,记录之间使用安装在SOLEIL同步加速器的DESIRS光束线上的真空-紫外傅立叶变换光谱仪,可以得到66,200和95,250 cm -1的光。隔离的强光谱线的波数精度为0.01 cm -1。属于七个波段的626条光谱线的数据集被合并到全局去扰动分析中。为A显著改进deperturbed分子常数1 Π(v = 1)α,α'- 3 Σ +v  = 10),d 1 Δ(v  = 1)和I 1 Σ - v  = 2)的水平,所述B的条款值1 Σ +v  = 0,1,... )和C 1 Σ +v  = 0)德堡态以及伴随的自旋轨道和旋转电子(大号-获得解偶联)的相互作用参数。在A的实验振转术语值1 Π(v = 1)水平及其扰动也已确定。交互状态的混合组成其来表示1个Π个字符。

更新日期:2020-08-04
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